A pressure follow-up temperature control valve and a pressure follow-up temperature control method special for a wind power cooler

Abstract

This invention discloses a pressure-following temperature control valve and a pressure-following temperature control method for wind power coolers. The pressure-following temperature control valve includes a valve body with a sliding cavity inside. A valve core that can reciprocate along the sliding cavity is disposed inside the sliding cavity. The valve core is a hollow cylinder with its outer wall fitting against the inner wall of the sliding cavity. The valve body has an inlet and an outlet. An annular groove is formed around the circumference of the sliding cavity, which communicates with the outlet. One end of the sliding cavity is connected to the inlet, and a baffle is disposed at the other end of the sliding cavity. A valve cap is disposed inside the valve core, with the cap edge connected to the inner wall of the valve core. The two ends of a spring abut against the valve cap and the baffle, respectively. A flow hole is formed on the side wall of the valve core, which communicates with the inlet through the cavity between the valve core and the valve cap. When the valve core slides close to the end of the sliding cavity that communicates with the inlet, the flow hole disconnects from the annular groove. When the valve core slides close to the end of the sliding cavity that is provided with the baffle, the flow hole communicates with the annular groove.

Description

Technical Field

[0001] This invention relates to the field of wind power lubrication oil switching technology, specifically to a pressure-following temperature control system for wind power coolers. Applicable to wind power lubrication systems equipped with coolers, it can control the flow rate of lubricating oil entering the cooler and the flow rate of bypass lubricating oil that does not pass through the cooler by controlling the pressure difference generated when the lubricating oil temperature changes, thereby controlling the temperature of the lubricating oil at the cooling downstream end. Background Technology

[0002] The lubricating oil flow of the filtration device in the wind power lubrication system is controlled by a thermostatic expansion valve. When the temperature is below 45°C, the lubricating oil goes directly to the distributor without passing through the cooler. When the temperature rises to 45°C, the valve core starts to move, gradually closing the branch to the distributor. When the temperature rises to 60°C, the branch to the distributor is completely closed. Because the thermostatic valve operates frequently at low temperatures, the thermostatic expansion valve has a high failure rate, which seriously affects the reliability of the equipment. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a pressure-following temperature control system specifically for wind turbine coolers. It achieves the control functions of the original temperature-following expansion valve without using a bulb-type expansion valve: at the set minimum temperature (e.g., 45°C), the lubricating oil pressure at the lubricating oil inlet pushes the valve core to connect the flow orifice with the annular groove, fully opening the pressure-following temperature control valve. As the lubricating oil temperature at the lubricating oil inlet continues to rise, the lubricating oil pressure at the lubricating oil inlet becomes insufficient to fully connect the flow orifice with the annular groove, causing the outlet of the pressure-following temperature control valve to gradually close. When the lubricating oil temperature at the lubricating oil inlet rises to the set maximum temperature (e.g., 60°C), the bypass from the outlet of the pressure-following temperature control valve to the oil distributor is completely closed. Because it does not use a bulb-type expansion valve, it solves the problem of failure and damage associated with traditional bulb-type expansion valves.

[0004] To achieve the above objectives, the present invention employs the following technical measures:

[0005] A pressure-following temperature control system for wind turbine coolers includes a pressure-following temperature control valve. The valve includes a valve body with a sliding cavity inside. A valve core, which can reciprocate along the sliding cavity, is installed inside the sliding cavity. The valve core is a hollow cylinder with its outer wall fitting against the inner wall of the sliding cavity. The valve body has an inlet and an outlet. An annular groove is formed around the circumference of the sliding cavity, which communicates with the outlet. One end of the sliding cavity is connected to the inlet, and a baffle is installed at the other end of the sliding cavity. A valve cap is installed inside the valve core, with the cap edge connected to the inner wall of the valve core. Two ends of a spring abut against the valve cap and the baffle, respectively. An overflow hole is formed on the side wall of the valve core, which communicates with the inlet through the cavity between the valve core and the valve cap. When the valve core slides close to the end of the sliding cavity that communicates with the inlet, the overflow hole disconnects from the annular groove. When the valve core slides close to the end of the sliding cavity that has the baffle, the overflow hole communicates with the annular groove.

[0006] The present invention also provides a pressure-following temperature control valve, including a valve body, a sliding cavity provided inside the valve body, a valve core that can reciprocate along the sliding cavity, the valve core being a hollow cylinder with its outer wall fitting against the inner wall of the sliding cavity, an inlet and an outlet provided on the valve body, an annular groove provided circumferentially in the sliding cavity, the annular groove communicating with the outlet, one end of the sliding cavity communicating with the inlet, a baffle provided at the other end of the sliding cavity, a valve cap provided inside the valve core, the rim of the valve cap connecting with the inner wall of the valve core, two ends of a spring abutting against the valve cap and the baffle respectively, an overflow hole provided on the side wall of the valve core, the overflow hole communicating with the inlet through the cavity between the valve core and the valve cap, when the valve core slides close to the end of the sliding cavity communicating with the inlet, the overflow hole disconnects from the annular groove, when the valve core slides close to the end of the sliding cavity where the baffle is provided, the overflow hole communicates with the annular groove.

[0007] Furthermore, the present invention also provides a pressure-following temperature control method for wind turbine coolers, which is applied to a pressure-following temperature control system for wind turbine coolers. The pressure-following temperature control system for wind turbine coolers uses the aforementioned pressure-following temperature control valve. In the system, the lubricating oil inlet is connected to both the inlet and the cooler's input port, and the outlet and the cooler's output port are both connected to the input port of the oil distributor. Thus, the flow of lubricating oil is controlled by the pressure-following temperature control valve.

[0008] The lubricating oil inlet is connected to both the inlet and the cooler inlet, while the outlet and the cooler outlet are both connected to the oil distributor inlet.

[0009] As described above, a sealing ring is provided between the baffle and the sliding cavity.

[0010] The present invention has the following advantages over the prior art:

[0011] 1. Simple structure and easy to use;

[0012] 2. Existing temperature control valves often fail in large numbers after 1 to 2 years of operation, causing wind turbine downtime for maintenance. This invention controls the on / off state by using the pressure difference between the two ends of the valve core caused by lubricating oil at different temperatures, thus achieving a switching function. It can replace existing temperature control valves, solving the problem of high failure rate and reducing wind turbine downtime for maintenance. It solves the problem of temperature control valve failure and addresses a major pain point in the wind power industry. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of a pressure-following temperature control valve.

[0014] Figure 2 This is a schematic diagram of the pressure-following temperature control valve from the left.

[0015] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the EE.

[0016] Figure 4 When the flow passage is connected to the annular groove Figure 1 A schematic diagram of the cross-sectional structure of the EE.

[0017] Figure 5 When the flow passage and the annular groove are not connected Figure 1 A schematic diagram of the cross-sectional structure of the EE.

[0018] Figure 6 This is a schematic diagram of the structure of the present invention.

[0019] In the diagram: 1-valve body; 2-valve core; 3-valve cap; 4-spring clip for the orifice; 5-spring; 6-baffle; 7-sealing ring; 8-retaining ring spring clip; 9-slide cavity; 10-inlet; 11-outlet; 12-annular groove; 13-flow hole; 14-lubricating oil inlet; 15-cooler; 16-oil distributor. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] like Figures 1-3As shown, a pressure-following temperature control system for wind turbine coolers includes a pressure-following temperature control valve. The valve includes a valve body 1, a sliding cavity 9 within the valve body 1, and a valve core 2 that can reciprocate along the sliding cavity 9. The valve core 2 is a hollow cylinder whose outer wall fits against the inner wall of the sliding cavity 9. The valve body 1 has an inlet 10 and an outlet 11. An annular groove 12 is circumferentially formed in the sliding cavity 9, communicating with the outlet 11. One end of the sliding cavity 9 is connected to the inlet 10, and the other end of the sliding cavity 9 has a baffle 6. A valve cap 3 is installed inside the valve core 2. The valve cap 3 has its rim connected to the inner wall of the valve core 2. The two ends of the spring 5 abut against the valve cap 3 and the baffle 6, respectively. The side wall of the valve core 2 has multiple flow holes 13 (preferably, these holes are evenly distributed). The flow holes 13 communicate with the inlet 10 through the cavity between the valve core 2 and the valve cap 3. When the valve core 2 slides close to the end of the slide cavity 9 that communicates with the inlet 10, the flow holes 13 disconnect from the annular groove 12. When the valve core 2 slides close to the end of the slide cavity 9 where the baffle 6 is located, the flow holes 13 communicate with the annular groove 12. A sealing ring 7 is provided between the baffle 6 and the slide cavity 9. The lubricating oil inlet 14 is connected to both the inlet 10 and the inlet of the cooler 15. The outlet 11 and the outlet of the cooler 15 are both connected to the inlet of the oil distributor 16.

[0022] In practical applications, the valve cap 3 can be secured to the inner wall of the valve core 2 using a spring clip 4, thus fixing the relative position between the valve cap 3 and the valve core 2. Alternatively, the valve cap 3 can be integrally connected to the inner wall of the valve core 2. A retaining ring spring clip 8 is provided on the inner wall of one end of the slide cavity 9 to prevent the baffle 6 from exiting the slide cavity 9. The sealing ring 7 ensures a seal between the baffle 6 and the slide cavity 9.

[0023] like Figure 4 As shown, when the temperature of the lubricating oil is low, the resistance to the flow of lubricating oil at the inlet 10 is large. The pressure formed on the left side of the slide cavity 9 pushes the valve core 2 to move to the right, while compressing the spring 5. The lower the temperature, the more the valve core 2 is pushed to the right, and the larger the area where the flow hole 13 and the annular groove 12 are connected. The lubricating oil coming in from the inlet 10 can smoothly pass through the cavity between the valve core 2 and the valve cap 3, the flow hole 13, and the annular groove 12 to the outlet 11. In practical applications, it can be designed such that when the temperature of the lubricating oil is less than or equal to 45°C, the area where the flow hole 13 and the annular groove 12 are connected is larger, and it is in a fully connected state.

[0024] like Figure 5As shown, when the lubricating oil temperature is high, the resistance to lubricating oil flow at inlet 10 is small, the pressure on the left side of valve core 2 decreases, the compressed spring 5 releases its force, pushing valve core 2 further to the left, and the area where the flow orifice 13 connects with the annular groove 12 decreases until the flow orifice 13 and the annular groove 12 disconnect, thus disconnecting the inlet 10 and the outlet 11, achieving closure. In practical applications, it can be designed so that when the lubricating oil temperature is greater than or equal to 60℃, the flow orifice 13 and the annular groove 12 are completely disconnected.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A pressure-following temperature control valve, characterized in that: The valve includes a valve body (1), a sliding cavity (9) is provided inside the valve body (1), and a valve core (2) that can slide back and forth along the sliding cavity (9) is provided inside the sliding cavity (9). The valve core (2) is a hollow cylinder whose outer wall fits against the inner wall of the sliding cavity (9). The valve body (1) is provided with an inlet (10) and an outlet (11). An annular groove (12) is provided around the sliding cavity (9), and the annular groove (12) is connected to the outlet (11). One end of the sliding cavity (9) is connected to the inlet (10), and a baffle (6) is provided at the other end of the sliding cavity (9). A valve cap (3) is provided inside the valve core (2). The cap edge is connected to the inner wall of the valve core (2). The two ends of the spring (5) abut against the valve cap (3) and the baffle (6) respectively. The side wall of the valve core (2) has an overflow hole (13). The overflow hole (13) is connected to the inlet (10) through the cavity between the valve core (2) and the valve cap (3). When the valve core (2) slides close to the end of the slide cavity (9) connected to the inlet (10), the overflow hole (13) is disconnected from the annular groove (12). When the valve core (2) slides close to the end of the slide cavity (9) where the baffle (6) is provided, the overflow hole (13) is connected to the annular groove (12).

2. The pressure-following temperature control valve as described in claim 1, characterized in that: The inlet (10) is connected to the lubricating oil inlet (14), which allows lubricating oil to be introduced into the inlet (10) and output without passing through the inlet (10).

3. The pressure-following temperature control valve as described in claim 2, characterized in that: The lubricating oil inlet (14) introduces lubricating oil into the inlet (10) and outputs it to the cooler (15) without passing through the inlet (10).

4. The pressure-following temperature control valve as described in claim 1, characterized in that: The cap (3) is secured to the inner wall of the valve core (2) and the relative position between the valve cap (3) and the valve core (2) is fixed by a spring clip (4) through a hole.

5. The pressure-following temperature control valve as described in claim 1, characterized in that: The rim of the valve cap (3) is integrally connected to the inner wall of the valve core (2).

6. The pressure-following temperature control valve as described in claim 1, characterized in that: A retaining ring spring clip (8) is provided on the inner wall of one end of the sliding cavity (9). The retaining ring spring clip (8) blocks the baffle (6) so that the baffle (6) does not exit from the sliding cavity (9).

7. The pressure-following temperature control valve as described in claim 1, characterized in that: A sealing ring (7) is provided between the baffle (6) and the sliding cavity (9).

8. A pressure-following temperature control valve as described in claim 1, characterized in that: When the temperature of the lubricating oil entering the inlet (10) is less than or equal to the first set threshold, the pressure formed by the lubricating oil on the left side of the slide cavity (9) increases to the point that the flow hole (13) and the annular groove (12) are fully connected; when the temperature of the lubricating oil entering the inlet (10) is greater than or equal to the second set threshold, the pressure formed by the lubricating oil on the left side of the slide cavity (9) decreases to the point that the flow hole (13) and the annular groove (12) are completely disconnected; wherein, the first set threshold is less than the second set threshold.

9. A pressure-following temperature control valve as described in claim 8, characterized in that: The first set threshold is 45°C, and the second set threshold is 60°C.

10. A pressure-following temperature control method specifically for wind turbine coolers, characterized in that: The system is applied to a pressure-following temperature control system for wind turbine coolers. The system uses a pressure-following temperature control valve as described in any one of claims 1-9. In the system, the lubricating oil inlet (14) is connected to the inlet (10) and the input port of the cooler (15) respectively. The outlet (11) and the output port of the cooler (15) are both connected to the input port of the oil distributor (16). The flow of lubricating oil is controlled by the pressure-following temperature control valve.

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